docs(lab3): PR-gated CI pipeline submission

.github/pull_request_template.md

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+## Goal
+<!-- What does this PR accomplish? 1 sentence. -->
+
+## Changes
+-
+
+## Testing
+<!-- How did you verify it? -->
+
+## Checklist
+- [ ] Title is a clear sentence (≤ 70 chars)
+- [ ] Commits are signed (`git log --show-signature`)
+- [ ] `submissions/labN.md` updated

.github/workflows/ci.yml

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+name: DevOps Intro Workflow
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - 'app/**'
+      - '.github/workflows/**'
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'app/**'
+      - '.github/workflows/**'
+
+permissions:
+  contents: read
+
+env:
+  GOFLAGS: -buildvcs=false
+
+jobs:
+  vet:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 1
+
+      - name: Setup Go compiler
+        uses: actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a # v5.2.0
+        with:
+          go-version: '1.24'
+          cache: true
+          cache-dependency-path: app/go.sum
+
+      - name: Run go vet
+        run: go vet ./...
+        working-directory: app
+
+  test:
+    runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        go: ['1.23', '1.24']
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 1
+
+      - name: Setup Go compiler
+        uses: actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a # v5.2.0
+        with:
+          go-version: ${{ matrix.go }}
+          cache: true
+          cache-dependency-path: app/go.sum
+
+      - name: Run unit tests
+        run: go test -race -count=1 ./...
+        working-directory: app
+
+  lint:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 1
+
+      - name: Setup Go compiler
+        uses: actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a # v5.2.0
+        with:
+          go-version: '1.24'
+          cache: true
+          cache-dependency-path: app/go.sum
+
+      - name: Run golangci-lint
+        uses: golangci/golangci-lint-action@1481404843c368bc19ca9406f87d6e0fc97bdcfd # v7.0.0
+        with:
+          version: v2.5.0
+          working-directory: app
+
+  ci-ok:
+    if: always()
+    needs: [vet, test, lint]
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Check status of dependent jobs
+        run: |
+          if ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}; then
+            echo "One or more dependent jobs failed or were cancelled."
+            exit 1
+          fi
+          echo "All dependent jobs completed successfully."

.gitignore

@@ -61,3 +61,5 @@ Thumbs.db
 #   *.sbom.cdx.json, zap-*.html/json, trivy-*.txt   (Lab 9 scan evidence)
 #   flake.nix, flake.lock      (Lab 11)
 #   wasm/main.go, spin.toml, go.sum   (Lab 12)
+data/
+app/data/

evidence/lab3-run-baseline.txt

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+
+тЬУ feature/lab3 DevOps Intro Workflow HNS2112/DevOps-Intro#1 ┬╖ 30975260042
+Triggered via pull_request about 1 hour ago
+
+JOBS
+тЬУ test in 28s (ID 92207831307)
+тЬУ lint in 25s (ID 92207831316)
+тЬУ vet in 23s (ID 92207831371)
+
+ANNOTATIONS
+! Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
+test: .github#2
+
+! Restore cache failed: Dependencies file is not found in /home/runner/work/DevOps-Intro/DevOps-Intro. Supported file pattern: go.sum
+test: .github#19
+
+! Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a, golangci/golangci-lint-action@1481404843c368bc19ca9406f87d6e0fc97bdcfd. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
+lint: .github#2
+
+! Restore cache failed: Dependencies file is not found in /home/runner/work/DevOps-Intro/DevOps-Intro. Supported file pattern: go.sum
+lint: .github#19
+
+! Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
+vet: .github#2
+
+! Restore cache failed: Dependencies file is not found in /home/runner/work/DevOps-Intro/DevOps-Intro. Supported file pattern: go.sum
+vet: .github#19
+
+
+For more information about a job, try: gh run view --job=<job-id>
+View this run on GitHub: https://github.com/HNS2112/DevOps-Intro/actions/runs/30975260042

evidence/lab3-run-matrix.txt

@@ -0,0 +1,46 @@
+
+тЬУ feature/lab3 DevOps Intro Workflow HNS2112/DevOps-Intro#1 ┬╖ 30979866915
+Triggered via pull_request about 8 minutes ago
+
+JOBS
+тЬУ vet (1.23) in 33s (ID 92221798058)
+тЬУ test (1.23) in 36s (ID 92221798062)
+тЬУ lint in 28s (ID 92221798075)
+тЬУ test (1.24) in 30s (ID 92221798094)
+тЬУ vet (1.24) in 23s (ID 92221798117)
+тЬУ ci-ok in 5s (ID 92221920679)
+
+ANNOTATIONS
+! Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
+vet (1.23): .github#2
+
+! Restore cache failed: Some specified paths were not resolved, unable to cache dependencies.
+vet (1.23): .github#27
+
+! Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
+test (1.23): .github#2
+
+! Restore cache failed: Some specified paths were not resolved, unable to cache dependencies.
+test (1.23): .github#27
+
+! Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a, golangci/golangci-lint-action@1481404843c368bc19ca9406f87d6e0fc97bdcfd. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
+lint: .github#2
+
+! Restore cache failed: Some specified paths were not resolved, unable to cache dependencies.
+lint: .github#20
+
+! Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
+test (1.24): .github#2
+
+! Restore cache failed: Some specified paths were not resolved, unable to cache dependencies.
+test (1.24): .github#20
+
+! Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
+vet (1.24): .github#2
+
+! Restore cache failed: Some specified paths were not resolved, unable to cache dependencies.
+vet (1.24): .github#20
+
+
+For more information about a job, try: gh run view --job=<job-id>
+View this run on GitHub: https://github.com/HNS2112/DevOps-Intro/actions/runs/30979866915

evidence/lab3-toolchain.txt

@@ -0,0 +1,6 @@
+
+vet (1.23)	Setup Go compiler	2026-08-05T06:00:17.8727961Z go version go1.23.12 linux/amd64
+vet (1.23)	Setup Go compiler	2026-08-05T06:00:18.4785450Z GOTOOLCHAIN='auto'
+vet (1.23)	Run go vet	2026-08-05T06:00:18.5194361Z go: downloading go1.24.0 (linux/amd64)
+
+